Big Bang afterglow fails intergalactic shadow test

News article on Science daily.
If the cosmic microwave background radiation was a remnant of the big bang fireball, galaxies should cast shadow on this CMBR.
But this test seems to fail, as only 1 out of 4 galaxie clusters cast shadows.

Wilkinson Microwave Anisotropy Probe (WMAP) has provided us with the yet highest resolution all-sky maps of the Cosmic Microwave Background. As a result of thermal Sunyaev-Zel'dovich effect, clusters of galaxies are imprinted as tiny, poorly resolved dips on top of primary CMB anisotropies in these maps. Here, I describe different efforts to extract the physics of Intracluster Medium (ICM) from the sea of primary CMB, through combining WMAP with low-redshift galaxy or X-ray cluster surveys. This finally culminates at a mean (universal) ICM pressure profile, which is for the first time directly constrained from WMAP 3yr maps, and leads to interesting constraints on the ICM baryonic budget.

Not Yet!!! Wait for planck data!
If CMB has local origin, there is still the shadowing effect, because there are CMB coming from both local origin of the places near earth and the local origin of far away places from the earth. But the shadowing effects are imprinted as tiny, poorly resolved dips on top of primary CMB anisotropies in these maps. The BB remnants interpretation would present as large, easily resolved dips on top of primary CMB anisotropies in these maps!!